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Cryogenic treatment of Cr12MoV before tempering

Editor：    Date：2014-07-11 15:33:48    Views：3171

Cr12MoV steel quenched and -196 ℃ cryogenic treatment, cryogenic treatment of AR steel was decreased from 43% to 14%, the hardness is increased from 60HRC to 64HRC, and α k=22.6J/ cm 2. TEM analysis showed that, the formation of cryogenic treated M segmentation AR grain, the AR broke into films or chunky, surrounded by around M. These AR due to multi by around M compression effect, and high mechanical stability, crack tip encountered this form of AR, will form the differences, so as to improve the toughness and the fatigue life of materials

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